Genotypic and Phenotypic Markers in Common Bean

Leakey, C. L. A.

doi:10.1007/978-94-009-2786-5_12

Cited by 76 publications

(84 citation statements)

References 52 publications

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“…Such efforts often face problems with low penetrance and/or heritability, especially of quantitative traits subjected to environmental influences, and with selective pressures applied during domestication and improvement (Leakey 1988). On the other hand, molecular markers are highly heritable, available in large numbers, and often polymorphic enough to enable discrimination of closely related genotypes.…”

Section: Introductionmentioning

confidence: 99%

Morphological and molecular diversity within Algerian cowpea (Vigna unguiculata (L.) Walp.) landraces

Ghalmi

Malice

Jacquemin

et al. 2009

Genet Resour Crop Evol

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Twenty landraces of cowpea (Vigna unguiculata (L.) Walp.) scattered throughout Algeria were compared through morphological and genetic characterization. At the morphological level, for qualitative characters there was no intra-landrace variation and for quantitative characters the variations were low except for landrace NAG2 Three different cultigroups were located in Algeria: Biflora that was dominant in the Sahara, Melanophtalmus in the North and Unguiculata including one landrace in Kabylia and two in Sahara. The AMOVA analysis indicated that the genetic variation was lower within than among agro-ecological regions. A Mantel test, revealed a correlation between the qualitative morphological data and the geographical data (R = 0.28; P \ 0.01), indicating that the degree of morphological change among landraces was roughly proportional to the geographical distances separating them.Genetic diversity was analyzed by using 11 random amplified polymorphic DNA (RAPD) and 12 intersimple sequence repeat (ISSR) markers. No intralandrace variability was found. The eleven RAPD primers yielded 77 bands, of which 45 (58.44%) were polymorphic; the genetic similarity ranged from 66.0 to 96.7%. The twelve ISSR primers provided a total of 104 bands, of which 65 (62.5%) were polymorphic; the genetic similarity ranged from 62.8 to 97.8%. cluster analysis showed a good match between genetic background and geographical distribution, which was confirmed by the results of the Mantel test. In particular, geographical data and genetic data were found to be correlated: (R = 0.33; P \ 0.01) for RAPD, (R = 0.37; P \ 0.01) for ISSR, and (R = 0.33; P \ 0.01) for a combined RAPD-ISSR dataset. Moreover, despite the absence of significant correlation between morphological and RAPD data (R = 0.14; P = 0.14), significant correlations between morphological data and both ISSR (R = 0.27, P \ 0.05) and a combined RAPD-ISSR dataset (R = 0.22, P \ 0.05) were noted. ISSR markers were better linked to morphological variation than were RAPD markers. However, despite this, genetic distances among these landraces were found to be essentially the same no matter which markers were used.

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Section: Introductionmentioning

confidence: 99%

Morphological and molecular diversity within Algerian cowpea (Vigna unguiculata (L.) Walp.) landraces

Ghalmi

Malice

Jacquemin

et al. 2009

Genet Resour Crop Evol

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“…As discussed in the introduction, the hilum corona trait is controlled by the Cor locus and the G locus determines the presence of yellow-brownish pigments in the seed coat and its expression may be epistatic in relation to the C or J loci responsible for the color of the testa (Leakey, 1988), Mendonça et al (1998) having shown that at least two independent genes are responsible for the presence of the orange corona trait and that in addition to the Cor locus three other loci (B, D, and G) must interact in the expression of corona color. Mendonça et al (1998) also reported that interaction between the B and G loci is important for the expression of orange corona color in the carioca bean group, 596 Genetic control of orange hilum corona which presents the recessive allele b in the homozygote.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of a hilum corona in beans is controlled by the Cor locus, but the color of the corona depends of the expression of other genes (Leakey, 1988). The phenotypic segregation observed in the F 2 offspring of some P. vulgaris crosses (P45 x Embrapa 201-Ouro, P45 x Carioca 300V and Carioca 300V x Embrapa 201-Ouro) has shown that at least two genes control the corona color trait, the Cor locus being responsible for the presence of a corona and the corona color being controlled by the interaction of three other loci (B, D, and G), the dark corona having the BBDDCorCorgg genotype and the yellow corona the BbddCorCorGG genotype (Mendonça et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Genetic control of orange hilum corona of carioca beans (Phaseolus vulgaris)

et al. 2007

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The purpose of this research was to elucidate the genetic control of orange corona color in carioca common beans (Phaseolus vulgaris). We made four crosses between carioca group cultivars that differed in respect to the presence or absence of an orange hilum corona color. The F 2 , F 3 , F 1 BC 11 , F 1 BC 21 , F 2 BC 11 and F 2 BC 21 phenotypic segregations were evaluated with a chi-square test which fitted with the hypothesis that one gene with a dominant allele is responsible for the orange corona color. All generations resulting from the four different crosses showed segregation patterns which agreed with the expected proportions. Our results show that the dominant G allele controls orange corona color in the carioca bean group.

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“…As cores do hipocótilo, da flor, do cotilédone e da listra da semente parecem ser governadas pelos mesmos genes, os quais apresentam interações epistáticas (Leakey, 1988). A cor do grão apresentou um inter-relacionamento com as características morfológicas de pigmentação.…”

Section: Resultsunclassified

Caracterização de linhagens endogâmicas recombinantes e mapeamento de locos de características quantitativas associados a ciclo e produtividade do feijoeiro-comum

Faleiro

Schuster²,

Ragagnin

et al. 2003

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi caracterizar 154 linhagens endogâmicas recombinantes por meio da avaliação de características quantitativas, morfológicas, moleculares e de resistência a doenças e mapear locos de características quantitativas associados a ciclo e produtividade do feijoeiro-comum. Adotando o valor do limite de detecção (LOD) de 4,0 e uma freqüência máxima de recombinação de 0,40, foram mapeados 43 marcadores em nove grupos de ligação cobrindo uma distância de recombinação total de 247,8 cM. A distância entre marcadores adjacentes variou entre 0 e 28 cM, com média de 7,3 cM. Os grupos de ligação variaram em tamanho de 2,3 a 61,2 cM. Os genes de resistência à ferrugem e à antracnose ficaram localizados no mesmo grupo de ligação. Foram mapeados locos associados às oito características quantitativas estudadas, e a explicação da variância fenotípica pelos marcadores variou de 14,03% a 40,14%. Os resultados encontrados lançam bases para o desenvolvimento de mapas específicos saturados e de utilidade em programas de melhoramento do feijoeirocomum.Termos para indexação: Phaseolus vulgaris, QTL, mapa genético, progênie, marcador genético, método de melhoramento. Characterization of recombinant inbred lines and QTL mapping associated to the cycle and yield of common beanAbstract -The objectives of this work were to characterize 154 recombinant inbred lines of common bean by evaluation of quantitative, morphologic, molecular and disease resistance characteristics and to map quantitative trait loci (QTL) associated to the cycle and production of common bean. Using a LOD score of 4.0 and a recombination frequency of 0.40, 43 markers were mapped into nine linkage groups, covering a total recombination distance of 247.8 cM. The distance between adjacent markers varied between 0 and 28 cM with average of 7.3 cM. The linkage groups size varied between 2.3 and 61.2 cM. The anthracnose and rust resistance genes were mapped in the same linkage group. QTL associated to the eight quantitative characteristics were mapped. The phenotypic variance explained by the QTL varied between 14.03% and 40.14%. The results obtained are the basis for the development of specific saturated maps to be used in common bean programs.

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Genotypic and Phenotypic Markers in Common Bean

Cited by 76 publications

References 52 publications

Morphological and molecular diversity within Algerian cowpea (Vigna unguiculata (L.) Walp.) landraces

Morphological and molecular diversity within Algerian cowpea (Vigna unguiculata (L.) Walp.) landraces

Genetic control of orange hilum corona of carioca beans (Phaseolus vulgaris)

Caracterização de linhagens endogâmicas recombinantes e mapeamento de locos de características quantitativas associados a ciclo e produtividade do feijoeiro-comum

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